JP5467005B2 - Touch position detecting device and mobile phone - Google Patents

Touch position detecting device and mobile phone Download PDF

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JP5467005B2
JP5467005B2 JP2010145929A JP2010145929A JP5467005B2 JP 5467005 B2 JP5467005 B2 JP 5467005B2 JP 2010145929 A JP2010145929 A JP 2010145929A JP 2010145929 A JP2010145929 A JP 2010145929A JP 5467005 B2 JP5467005 B2 JP 5467005B2
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electrode
position information
axis
set
touched
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JP2012008903A (en
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奈緒 田中
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京セラ株式会社
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/047Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04104Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger

Description

  The present invention relates to a touch panel operation, and more particularly to a technique for detecting a touch position at n points (n is an integer of 2 or more).

In recent years, many terminal devices having a touch panel function have appeared.
For example, Patent Document 1 discloses a touch panel in which a plurality of electrode lines are arranged in each of the x direction and the y direction orthogonal to each other. In this touch panel, if one point is touched, the voltage change of the touched electrode line is different from the voltage change that is not touched. One electrode line in the direction is specified. Then, one point touched by the combination is determined.

  With such a technique, a single touch can be detected on the touch panel.

Japanese Patent Laid-Open No. 7-13680

On the other hand, two points may be touched simultaneously on the touch panel, for example.
However, in Patent Document 1, when two points are touched at the same time, the two points cannot be detected at the same time. This is because if two points are touched simultaneously, two electrode lines are specified from the x direction and the y direction, respectively. Then, there are four combination patterns of the x-direction electrode lines and the y-direction electrode lines, and two points cannot be specified.

Therefore, in order to detect a plurality of points simultaneously, it is conceivable to provide a sensor for detecting a touch at the intersection of the x-direction electrode line and the y-direction electrode line, but this makes the configuration of the touch panel complicated. It's not a good idea.
SUMMARY OF THE INVENTION An object of the present invention is to provide a touch position detection device that appropriately detects a plurality of touched positions on a touch panel.

  In order to achieve the above object, the present invention is a touch position detection device including (n + 1) sets of a plurality of transparent electrodes arranged in parallel to each other (n is an integer of 2 or more), and these sets. Touch panel arranged with a predetermined angular relationship that intersects each other, and when n points are touched on the touch panel, the position for each set of electrodes corresponding to the n points touched A detection unit that detects information, and a specifying unit that specifies the n positions touched on the touch panel based on the detected position information and the predetermined angular relationship. .

  According to this configuration, the touch position detection device, based on position information detected from a touch panel having a set of n + 1 electrodes having a predetermined angular relationship, determines n combinations touched from the predetermined angular relationship. Since the identification is performed, n touched positions can be appropriately detected.

(A) is a figure which shows the external appearance of the mobile telephone (touch position detection apparatus) 1, (b) is a block diagram which shows the internal structure of the mobile telephone (touch position detection apparatus) 1. FIG. 3 is a diagram illustrating a configuration of a touch detection function in the mobile phone 1. FIG. It is a figure which shows arrangement | positioning of a transparent electrode. 1 is a diagram illustrating a schematic structure of a touch panel 10. It is a figure which shows the relationship of the z-axis component according to the group of an x-axis component and a y-axis component. 5 is a flowchart showing an operation of processing related to two-point simultaneous detection in the mobile phone 1; It is a figure which shows the relationship of the z-axis component according to the group of the x-axis component and the y-axis component when the angle which an x-axis and a z-axis make is (theta). (A) is a figure which shows the specific example at the time of two-point simultaneous detection, (b) respectively shows the specific example at the time of three-point simultaneous detection.

1. First Embodiment A touch position detecting apparatus 1 as a first embodiment according to the present invention will be described.
1.1 Outline The touch position detection device 1 is applied to, for example, a mobile phone, and the external appearance thereof will be described with reference to FIG.

The touch position detection device 1 includes housings 2 and 3 and is configured to be able to open and close each other by sliding the housing 2 relative to the housing 3.
The housing 2 is provided with a display unit 4 constituted by a liquid crystal display (hereinafter referred to as LCD (Liquid Crystal Monitor)) having a touch panel function, and a speaker unit 6.

A key operation unit 5 and a microphone 7 are disposed in the housing 3.
Next, the internal configuration of the mobile phone 1 as the touch position detection device shown in FIG. 1A will be described with reference to FIG. As shown in FIG. 1B, the mobile phone 1 includes a processor 301 that is also called a CPU (Central Processing Unit).

  The display unit 4, the key operation unit 5, the speaker 6, and the microphone 7 shown in FIG. 1A are connected to the processor 301, and further, a RAM (Random Access Memory) 302, a flash memory 303, and an external memory 304. Is connected. Note that the internal components shown in FIG. 1B illustrate the main components of the mobile phone 1 as the touch position detection device, and the touch position detection device according to the present embodiment. The mobile phone 1 may include other members than those shown in FIG.

The display unit 4 constitutes a touch panel described later, displays an image, and accepts a touch input.
The key operation unit 5 includes a numeric keypad and receives a key input.
The speaker unit 6 emits sound to the outside.
The microphone 7 acquires an external sound.

The processor 301 controls the overall operation of the mobile phone 1 as a touch position detection device.
The RAM 302 is used as a work area for the processor 301.
The flash memory 303 stores character data, image data, and other various data used for the mobile phone 1 as a touch position detection device, program data that is processed in cooperation with the processor 301, and the like.

Note that the memory of the mobile phone 1 is not limited to the flash memory 303, and other media may be used.
The external memory 304 is detachably loaded with a recording medium. Examples of the removable recording medium include other appropriate recording media such as an SD card (registered trademark) and a USB (Universal Serial Bus) memory. This recording medium stores character data, image data, and other various data used for the mobile phone 1 as a touch position detection device, and program data that is processed in cooperation with the processor 301.

The external memory 304 is not limited to an SD card (registered trademark) or a USB memory, but may be other media.
When two points are touched on the display unit 4, the touch position detection device 1 detects the two points touched by the touch panel function. Note that the touch panel function of this embodiment is operated by a capacitance method.

In addition, the simultaneous touch described below is not only a case where the touch periods of a plurality of points on the touch panel completely match from the start to the end of the touch, but also at least a part of the touch periods of the plurality of touches at the same time. If it is.
Further, the simultaneous detection described below includes detecting a plurality of touch positions in the simultaneous period in a period in which a plurality of touches on the touch panel are simultaneous.

1.2 Configuration Here, the configuration of the two-point simultaneous detection function in the touch position detection device 1 will be described.
The two-point simultaneous detection function of the touch position detection device 1 includes a display unit 4 and a detection processing unit 20 as shown in FIG.
In FIG. 2, only the components related to the two-point simultaneous detection function are shown in FIG. 2, but other functions as a mobile phone such as the key operation unit 5 and the components related to the communication function are shown. I have.

Hereinafter, detection of a touch position when two points are simultaneously touched on the display unit 4 will be described.
(1) Display unit 4
The display unit 4 includes a touch panel 10 having a function of simultaneously detecting two points touched with a finger.

Here, the detection method of the touch position of the touch panel is a self-capacitor type electrostatic capacity method.
The touch panel 10 has a plurality of transparent electrodes corresponding to the x axis, the y axis, and the z axis. Fig.3 (a) shows an example of arrangement | positioning of the transparent electrode with respect to each axis.
The transparent electrodes 101a, 101b,..., 101c orthogonal to the x-axis are for specifying the x-axis component, and the transparent electrodes 102a, 102b,. This is for specifying the component of the axis. Here, the x-axis is the horizontal axis direction when displaying an image or the like, and the y-axis is the vertical axis direction. Since the x-axis and the y-axis are orthogonal, it can be seen that the transparent electrodes 101a, 101b,..., 101c are orthogonal to the transparent electrodes 102a, 102b,.

Further, as shown in FIG. 3B, the z-axis intersects the x-axis at 45 ° on the plane formed by the x-axis and the y-axis, and the transparent electrode 103a orthogonal to the z-axis. , 103b,..., 103c are for specifying the z-axis component. Here, the positional information for each set of electrodes is the distance (length) from O where the three axes intersect. This distance becomes a component of each axis.
FIG. 4A schematically shows the structure of the touch panel 10.

As shown in FIG. 4A, the touch panel 10 includes dielectrics 110, 111, and 112, x-axis transparent electrodes 120a and 120b, y-axis transparent electrodes 121a and 121b, z-axis transparent electrodes 122a and 122b, and pulses. A drive buffer 130, a voltage comparator 131, and a timer capture register 132 are included.
The x-axis transparent electrodes 120a and 120b are shown in FIG. 3 as transparent electrodes 101a, 101b,..., 101c, and the y-axis transparent electrodes 121a and 121b are shown as transparent electrodes 102a, 102b,. The z-axis transparent electrodes 122a and 122b correspond to the transparent electrodes 103a, 103b,..., 103c in FIG.

The touch panel 10 is arranged with a dielectric 110, x-axis transparent electrodes 120a and 120b, a dielectric 111, y-axis transparent electrodes 121a and 121b, a dielectric 112, and z-axis transparent electrodes 122a and 122b in order from the top. Yes.
The pulse drive buffer 130 is connected to the x-axis transparent electrode 120a. As shown in FIG. 4B, the pulse drive buffer 130 generates a pulse signal having a low level of 0V and a high level of 5V at a cycle of 1 / 100s. It transmits to the transparent electrode 120a. Although not shown, for example, each of the y-axis transparent electrode 121a and the z-axis transparent electrode 122a is individually connected to a pulse drive buffer.

  The voltage comparator 131 is connected to the x-axis transparent electrode 120b and compares whether the voltage of the x-axis transparent electrode 120b is 5V or 0V. The timer capture register 132 specifies whether or not the voltage is changed by the pulse signal at a period of 1/100 s based on the comparison result of the voltage comparator 131. Although not shown, for example, also in each of the y-axis transparent electrode 121b and the z-axis transparent electrode 122b, a voltage comparator and a timer capture register are individually connected.

  Specifically, when the x-axis transparent electrode 120a receives a pulse signal from the pulse drive buffer 130, the same voltage as that of the x-axis transparent electrode 120a is applied to the x-axis transparent electrode 120b by electric field coupling. In a capacitive touch panel, when a certain point is touched, charges are accumulated in the transparent electrode immediately below, and the rise of the pulse signal input from the pulse drive buffer 130 (rise from 0V to 5V) It becomes dull. That is, the periodic change of the voltage is disturbed at a period of 1 / 100S. As the timer capture register identifies the change, it can be seen that at least one of the x-axis transparent electrode 120a and the x-axis transparent electrode 120b is touched.

It can also be seen whether or not the y-axis transparent electrodes 121a and 121b and the z-axis transparent electrodes 122a and 122b are touched by the same principle.
(2) Detection processing unit 20
As illustrated in FIG. 2, the detection processing unit 20 includes an axis component detection unit 201 and a specifying unit 202.

(2-1) Axis component detector 201
The axis component detection unit 201 detects a touched axis component for each of the x, y, and z axes. This axial component becomes position information for each set of electrodes.
Specifically, when detecting the x-axis component, the axis component detection unit 201 disturbs the periodic change by the function of each timer capture register connected to each x-axis transparent electrode. Two components are detected.

Similarly, for the y-axis and the z-axis, two components whose periodic changes are disturbed are detected by the function of each timer capture register connected to each transparent electrode for each axis.
The function of the axis component detection unit 201 detects X1 and X2 as x-axis components, Y1 and Y2 as y-axis components, and Z1 and Z2 as z-axis components.

(2-2) Identification unit 202
The identifying unit 202 identifies the two touched points from the components of each axis detected by the axis component detecting unit 201.
Specifically, two touched points are specified as follows.
The specifying unit 202 selects one combination (X1, Y1) including the x axis and the y axis detected by the axis component detection unit 201. The specifying unit 202 calculates a z-axis component Z3 corresponding to the selected (X1, Y1) using the following formula 1.

The specifying unit 202 determines whether or not the calculated Z3 is equal to any of Z1 and Z2 detected by the axis component detection unit 201. When determining that it is equal to any one, the specifying unit 202 specifies the selected combination (X1, Y1) and the remaining combination (X2, Y2) as indicating the correct position touched. When it is determined that Z3 is not equal to any one, the identifying unit 202 determines that the selected combination (X1, Y1) is an error, and the other combination (X1, Y2) and (X2, Y1) ) To indicate the correct touched position.

Hereinafter, it will be described that the z-axis component Z3 corresponding to the selected (X1, Y1) is obtained by the above formula 1.
As described above, since the z-axis forms an angle of 45 ° with the x-axis, the z-axis is expressed as a linear function “y = x”. Since the z-axis transparent electrode passing through (X1, Y1) is orthogonal to the z-axis, it is expressed as a linear function “y = −x + b”. Further, (X1, Y1) passes through the linear function “y = −x + b” to become “b = X1 + Y1”, and the linear function “y = −x + b” is converted to “y = −x + (X1 + Y1)”. it can.

The z-axis component Z3 corresponding to the selected (X1, Y1) can be calculated from the intersection of the linear function “y = x” and the linear function “y = −x + (X1 + Y1)”.
When the intersection of the linear function “y = x” and the linear function “y = −x + (X1 + Y1)” is calculated, the x-axis component of the intersection is “(X1 + Y1) / 2”, and the y-axis component of the intersection is “(X1 + Y1). ) / 2 ".

Here, Z3 of the z-axis component is a hypotenuse of a right-angled isosceles triangle in which the x-axis component “(X1 + Y1) / 2” and the y-axis component “(X1 + Y1) / 2” are orthogonal as shown in FIG. Therefore, the above Equation 1 is derived from the three-square theorem.
1.3 Operation Here, processing related to simultaneous detection of two points will be described with reference to a flowchart shown in FIG.

The user touches two points on the touch panel 10 (step S5).
The axis component detection unit 201 uses X1 and X2 as x-axis components, Y1 and Y2 as y-axis components, and Z1 as z-axis components by the functions of a plurality of timer capture registers provided for each axis. Z2 is detected (step S10).
The specifying unit 202 selects one combination (X1, Y1) composed of the x axis and the y axis detected by the axis component detection unit 201 (step S15).

The specifying unit 202 calculates the z-axis component Z3 corresponding to the selected (X1, Y1) using the above-described formula 1 (step S20), and the calculated Z3 is detected by the axis component detecting unit 201. It is determined whether or not it is equal to at least one of the components Z1 and Z2 (step S25).
When determining that Z3 is equal to at least one of Z1 and Z2 (“Yes” in step S25), the specifying unit 202 touches the selected combination (X1, Y1) and the remaining combination (X2, Y2). It is specified as indicating the correct position (step S30).

When it is determined that Z3 is not equal to any of Z1 and Z2 (“No” in step S25), the specifying unit 202 has the correct position where the other combination (X1, Y2) and (X2, Y1) are touched. (Step S35).
1.4 Modification Example (1) Modification Example of Two-Point Simultaneous Detection In the first embodiment, the z-axis forms an angle of 45 ° with the x-axis, that is, the transparent electrodes 103a, 103b,. Is formed at an angle of 45 ° with the transparent electrodes 101a, 101b,..., 101c, but is not limited thereto.

The x-axis and the z-axis only need to intersect, and the intersecting angle may be θ (0 ° <θ <90 °). That is, the x axis, the y axis, and the z axis only need to intersect each other. In this case, the angle formed between the transparent electrodes 101a, 101b,..., 101c perpendicular to the x axis and the transparent electrodes 103a, 103b,.
In this case, the mathematical formula used by the specifying unit 202 is different from that in the above embodiment.

  The specifying unit 202 determines whether or not the selected (X1, Y1) is equal to at least one of the detected Z1 and Z2 using the following formula 2.

When it is determined that the calculated Z3 is equal to either Z1 or Z2, the specifying unit 202 indicates the correct position where the selected combination (X1, Y1) and the remaining combination (X2, Y2) are touched. As specified. When determining that the calculated Z3 is not equal to any of Z1 and Z2, the specifying unit 202 specifies that the other combination (X1, Y2) and (X2, Y1) indicate the correct position touched. .

Hereinafter, it will be described that when the angle formed between the z-axis and the x-axis is θ, the z-axis component Z3 corresponding to the selected (X1, Y1) is obtained by the above-described mathematical formula 2.
Since the angle formed by the z-axis and the x-axis is θ, the z-axis is expressed as a linear function “y = tan θ · x”. Since the z-axis transparent electrode passing through (X1, Y1) is orthogonal to the z-axis, it is expressed as a linear function “y = (− 1 / tan θ) · x + b”. Further, (X1, Y1) passes through the linear function “y = (− 1 / tan θ) · x + b” to become “b = (1 / tan θ) · X1 + Y1”, and the linear function “y = −x + b” becomes , “Y = −x + ((1 / tan θ) · X1 + Y1)”.

The z-axis component Z3 corresponding to the selected (X1, Y1) is a linear function “y = tan θ · x” and a linear function “y = (− 1 / tan θ) · x + ((1 / tan θ) · X1 + Y1)”. It can be calculated from the intersection of
Therefore, when the intersection of the linear function “y = tan θ · x” and the linear function “y = (− 1 / tan θ) · x + ((1 / tan θ) · X1 + Y1)” is calculated, the x-axis component of the intersection is “( X1 + tan θ · Y1) / (tan 2 θ + 1) ”, and the y-axis component of the intersection is“ tan θ · (X1 + tan θ · Y1) / (tan 2 θ + 1) ”.

Here, Z3 of the z-axis component is a hypotenuse of a right triangle where the x-axis component “(X1 + Y1) / 2” and the y-axis component “(X1 + Y1) / 2” are orthogonal to each other, as shown in FIG. Then, according to the three-square theorem, “(Z3) 2 = (tan θ · Y1 + X1) 2 / (tan 2 θ + 1). Here,“ tan 2 θ + 1 = 1 / cos 2 θ ”,“ tan θ = sin θ / cos θ. According to the relational expression “(Z3) 2 = (X1 + tan θ · Y1) 2 / (tan 2 θ + 1) = (X1 + (sin θ / cos θ) · Y1) 2 · cos 2 θ”. Then, “Z3 = ( X1 + (sin θ / cos θ) · Y1) · cos θ = X1 · cos θ + sin θ · Y1 ″ is derived.

(2) Three-point simultaneous detection In the first embodiment described above, the touch position detection device detects two points simultaneously, but the present invention is not limited to this. The touch position detection device may detect three points simultaneously.
In this case, the z axis forms an angle of θ with the x axis, as in the above modification. Further, a w-axis that forms an angle of 90 ° with the z-axis is provided. In addition, the touch panel includes a plurality of x-axis transparent electrodes, y-axis transparent electrodes, and z-axis transparent electrodes, respectively, as in the first embodiment and the modified example, and further includes w orthogonal to the w-axis. A plurality of transparent electrodes for shafts are provided. The structure shown in FIG. 3 is further provided with a dielectric and a w-axis transparent electrode on the lower surface of the z-axis transparent electrode. In the plurality of w-axis transparent electrodes, similarly to the transparent electrodes of the other axes, the pulse drive buffer, the voltage comparator, and the timer capture register are alternately connected.

In this case, the axis component detection unit 201 detects the touched axis component (position information) for each of the x, y, z, and w axes. For example, the axis component detection unit 201 uses X1, X2, and X3 as the x-axis component, Y1, Y2, and Y3 as the y-axis component, Z1, Z2, and Z3 as the z-axis component, and W1, W2, and the w-axis component. W3 is detected respectively.
The specifying unit 202 uses the following Equation 3 to calculate an x-axis component (X1, X2, X3), a y-axis component (Y1, Y2, Y3), a z-axis component (Z1, Z2, Z3), a w-axis component ( Three sets of x-axis component, y-axis component, z-axis component, and w-axis component satisfying Equation 3 are specified among W1, W2, and W3).

The specifying unit 202 specifies the correct position where the specified x-axis component and y-axis component of each set are touched.

By using Equation 3, the z-w axis is rotated to coincide with the xy axis, and whether or not the detected position on the xy axis coincides with the position on the zw axis. Can be determined. At this time, if they match, it can be identified as the position actually touched.
1.5 Specific Example FIG. 8A shows a specific example when two points are simultaneously detected.

  In this figure, it is assumed that P1 (X1, Y1) and P2 (X2, Y2) are actually touched positions. In this case, X1, X2, Y1, Y2, Z1, and Z2 are detected by using the x-axis transparent electrode, the y-axis transparent electrode, and the z-axis transparent electrode. Then, P3 (X2, Y1) and P4 (X1, Y2) shown in FIG. 8A exist as combinations of the x-axis component and the y-axis component in addition to the above-described P1 and P2. Therefore, the specifying unit 202 selects one combination from these combinations. If the selected combination is correct, that is, indicates the actually touched position, the z-axis component corresponding to the selected combination coincides with either detected Z1 or Z2.

As can be seen from FIG. 8A, when the specifying unit 202 selects P1, the z-axis component corresponding to P1 is Z1, which is actually detected Z1, and therefore the selected P1 is correct. Become. Then, the remaining combination of the x-axis component and the y-axis component inevitably becomes P2, which is also the actually touched position.
For example, when the specifying unit 202 selects P3, it can be seen from FIG. 8A that the z-axis component corresponding to P3 does not match any of the actually detected Z1 and Z2. As a result, it can be seen that the selected P3 is wrong, that is, a position not touched. Further, it can be seen that the remaining combination (here, P4) composed of the x-axis component and the y-axis component when P3 is selected is also a position that is not touched. That is, the specifying unit 202 can specify that a combination different from P3 and P4, that is, P1 and P2 are correct.

FIG. 8B shows a specific example when three points are detected simultaneously.
In this figure, it is assumed that P1 (X1, Y1), P2 (X2, Y2), and P3 (X3, Y3) are actually touched positions. In this case, by using a transparent electrode for x-axis, a transparent electrode for y-axis, and a transparent electrode for z-axis, X1, X2, X3, Y1, Y2, Y3, Z1, Z2, Z3, W1, W2, W3 is detected. Then, P4 to P9 shown in FIG. 8B exist as combinations of the x-axis component and the y-axis component, in addition to the above-described P1 and P2.

And the specific | specification part 202 specifies the combination in which the said numerical formula is materialized using Numerical formula 3. For example, (X1, Y1, Z1, W1), (X2, Y2, Z2, W2), (X3, Y3, Z3, W3) are specified here.
The specifying unit 202 specifies, as the touched position, a position determined from the x-axis component and the y-axis component that constitute the combination from each of the three specified combinations. For example, here, (X1, Y1), (X2, Y2), (X3, Y3) are specified as touched positions.

1.6 Other Modifications Although the description has been given based on the embodiment and the modification, the present invention is not limited to the embodiment and the modification described above. For example, the following modifications can be considered.
(1) In the first embodiment, a slide-type mobile phone is used as an example to which the touch position detection device 1 is applied. However, the present invention is not limited to this.

The touch position detection device 1 may be a foldable mobile phone, a straight-type mobile phone, or a mobile phone in any other appropriate form.
In addition, the device to which the touch position detection device 1 is applied is not limited to a mobile phone. If the device has a touch panel mechanism, a PDA (Personal Digital Assistant), a PHS (Personal Handy-phone System), a music player, An electronic book, a game machine, a personal computer, etc. may be sufficient.

(2) In the above-described embodiment and modification, the simultaneous detection of two points and three points has been described, but the present invention is not limited to this.
The touch position detecting device may provide n + 1 axes and simultaneously detect n points.
(3) A program describing the procedure of the method described in the above embodiments and modifications is stored in a memory, and a CPU (Central Processing Unit) or the like reads the program from the memory and executes the read program Thus, the above method may be realized.

Further, a program describing the procedure of the method may be stored in a recording medium and distributed.
As a medium for storing the program, for example, a non-temporary recording medium as shown in FIG. 1B, that is, a flash memory 303, a USB memory, an SD card (registered trademark), or the like. The external memory 304 can be given as an example.

(4) In the embodiment and the modification described above, n axis components of each axis corresponding to the touched position are detected. However, the present invention is not limited to this. The above detection method can be applied even when n or less axis components are detected for each axis.
For example, in the case of two-point simultaneous detection, for each combination of the detected x-axis axis component and y-axis axis component, the corresponding z-axis axis component is calculated using Equation 1, and the calculated axis component It is possible to perform two-point simultaneous detection by verifying whether or not an axial component equal to is detected.

Similarly, the three-point simultaneous detection may be verified using Formula 2 for each combination of the detected x-axis axis component and y-axis axis component.
(5) In the above embodiment, each electrode is a transparent electrode, but the present invention is not limited to this. If it is an electrode used for a touch panel, the kind will not ask | require.
(6) Although the angle formed by the transparent electrodes 101a, 101b,..., 101c and the transparent electrodes 102a, 102b,..., 102c is 90 ° in the above embodiment, the present invention is not limited to this.

The angle formed by the transparent electrodes 101a, 101b, ..., 101c and the transparent electrodes 102a, 102b, ..., 102c may not be strictly 90 °. It may be about 90 °.
Similarly, in the case of simultaneous detection at three points, the z-axis and the w-axis do not have to be strictly orthogonal. The angle formed by the z axis and the w axis may be approximately 90 °. That is, the angle formed between the z-axis transparent electrode and the w-axis transparent electrode may be approximately 90 °.

(7) The above embodiments and modifications may be combined.
2. Summary (1) The touch position detection device according to one aspect of the present invention includes (n + 1) sets of a plurality of transparent electrodes arranged in parallel to each other (n is an integer of 2 or more), and these sets are When touching n points on the touch panel arranged with a predetermined angular relationship intersecting each other and touching the n points on the touch panel, position information for each set of electrodes corresponding to the touched n locations is obtained. A detection unit for detecting, and a specifying unit for specifying the n positions touched on the touch panel based on the detected position information and the predetermined angular relationship.

According to this configuration, the touch position detection device, based on position information detected from a touch panel having a set of n + 1 electrodes having a predetermined angular relationship, determines n combinations touched from the predetermined angular relationship. Since the identification is performed, n touched positions can be appropriately detected.
(2) Here, the value of n is 2, and the electrode included in the first electrode set and the electrode included in the second electrode set of the three electrode sets are approximately 90 degrees. The predetermined angular relationship is that the electrodes included in the first electrode set and the electrodes included in the third electrode set form an angle θ among the three electrode sets. The detection unit detects position information X1 and X2 in the first electrode set, position information Y1 and Y2 in the second electrode set, and position information Z1 and Z2 in the third electrode set. The specifying unit calculates position information Z3 determined from the detected coordinates (X1, Y1) of X1 and Y1, and when the calculated Z3 is equal to at least one of detected Z1 and Z2. The coordinates (X1, Y1), (X2, Y2) are identified as the touched position, and what Both coordinates (X1, Y2) in the case not equal, (X2, Y1) may be specified as a touch position.

According to this configuration, the touch position detection device specifies two touched points depending on whether or not the position information Z3 determined from the coordinates (X1, Y1) is equal to at least one of the detected Z1 and Z2. . Thereby, the touch position detection apparatus can specify two points touched appropriately.
(3) where Z3 is

May be required.
According to this configuration, since the touch position detection device has a predetermined angular relationship, Z3 can be obtained using the above formula.

  (4) Here, the value of n is 3, and the electrode included in the first electrode set and the electrode included in the second electrode set of the four electrode sets are approximately 90 degrees. The electrodes included in the third electrode set and the electrodes included in the fourth electrode set are arranged so as to cross at about 90 degrees, and the predetermined angular relationship is The electrode included in the first electrode set and the electrode included in the third electrode set have an angle θ, and the detection unit is configured to detect the first based on the touched three points. Position information X1, X2, X3 in the electrode set, position information Y1, Y2, Y3 in the second electrode set, position information Z1, Z2, Z3 in the third electrode set, and the fourth Position information W1, W2, W3 in a set of electrodes is detected, and the specific unit detects the detected third electrode The combination of the position information in the set and the position information in the fourth electrode set is

The three combinations of the position information in the first electrode set and the position information in the second electrode set satisfying the above condition may be specified as the three touched points. Where x is position information in the first electrode set, y is position information in the second electrode set, z is position information in the third electrode set, and w is the fourth electrode set. This is the position information value at.

According to this configuration, the touch position detection device has a predetermined angular relationship, and thus can determine the three touched points using the above formula.
(5) Here, the positional information for each set of electrodes may be an axial component of an axis set in a direction perpendicular to the electrodes.
According to this configuration, the touch position detection device can specify position information for each set of electrodes by using an axis set in a direction perpendicular to the electrodes.

(6) Moreover, the mobile phone which is 1 aspect of this invention is provided with the touch position detection apparatus as described in any one of said (1) to (5).
According to this configuration, since the mobile phone includes the touch position detection device described in any one of (1) to (5) above, it is possible to appropriately detect n touched positions.

  The present invention is useful for detecting n touched positions (n is an integer of 2 or more) in a touch position detecting device having a touch panel mechanism.

DESCRIPTION OF SYMBOLS 1 Touch position detection apparatus 2, 3 Case 4 Display part 5 Key operation part 6 Speaker part 7 Microphone 10 Touch panel 20 Detection processing part 130 Pulse drive buffer 131 Voltage comparator 132 Timer capture register 201 Axis component detection part 202 Identification part 301 Processor 302 RAM
303 Flash memory 304 External memory

Claims (5)

  1. A touch panel including three sets of a plurality of transparent electrodes arranged in parallel to each other, and arranged with a predetermined angular relationship in which these sets cross each other;
    When two points are touched on the touch panel, a detection unit that detects position information for each set of the electrodes corresponding to the two touched locations;
    On the basis the detected position information to said predetermined angular relationship, e Bei a specifying unit configured to specify the two positions are touched on the touch panel,
    Of the three electrode sets, the electrode included in the first electrode set and the electrode included in the second electrode set are arranged so as to intersect at approximately 90 degrees,
    The predetermined angular relationship is a relationship in which an electrode included in the first electrode group and an electrode included in the third electrode group among the three electrode groups form an angle θ.
    The detection unit detects position information X1, X2 in the first electrode set, position information Y1, Y2 in the second electrode set, and position information Z1, Z2 in the third electrode set,
    The specific part is:
    The position information Z3 determined from the detected coordinates (X1, Y1) consisting of X1 and Y1 is calculated. If the calculated Z3 is equal to at least one of the detected Z1 and Z2, coordinates (X1, Y1), (X2, Y2) is identified as a touched position, and if it is not equal to any of the coordinates, the coordinates (X1, Y2), (X2, Y1) are identified as the touched position. .
  2. Z3 is
    The touch position detecting device according to claim 1 , wherein the touch position detecting device is obtained by:
  3. The positional information for each set of electrodes is
    The touch position detecting device according to claim 1, wherein the touch position detecting device is an axial component of an axis set in a direction perpendicular to the electrode.
  4. A mobile phone comprising the touch position detection device according to any one of claims 1 to 3 .
  5. A touch panel including four sets of a plurality of transparent electrodes arranged in parallel to each other, and having a predetermined angular relationship in which these sets cross each other;
    When three points are touched on the touch panel, a detection unit that detects position information for each set of the electrodes corresponding to the three touched locations;
    Based on said detected position information and the predetermined angular relationship, e Bei a specifying unit configured to specify the three position touched on the touch panel,
    Of the four electrode sets, the electrode included in the first electrode set and the electrode included in the second electrode set are arranged so as to intersect at approximately 90 degrees, and are included in the third electrode set. The electrode and the electrode included in the fourth electrode set are arranged so as to intersect at approximately 90 degrees,
    The predetermined angular relationship is a relationship in which an electrode included in the first set of electrodes and an electrode included in the third set of electrodes form an angle θ,
    Based on the touched three points, the detection unit includes position information X1, X2, X3 in the first electrode set, position information Y1, Y2, Y3 in the second electrode set, the third electrode Detecting position information Z1, Z2, Z3 in the electrode set and position information W1, W2, W3 in the fourth electrode set;
    The specific part is:
    The combination of the detected position information in the third electrode set and the position information in the fourth electrode set is:
    The three combinations of the position information on the first electrode set and the position information on the second electrode set satisfying the above are specified as the three touched points.
    A touch position detecting device characterized by the above. Where x is position information in the first electrode set, y is position information in the second electrode set, z is position information in the third electrode set, and w is the fourth electrode set. This is the position information value at.
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